CN107489777B

CN107489777B - Air quantity regulating valve for air duct, variable air quantity tail end and air conditioning system

Info

Publication number: CN107489777B
Application number: CN201710749991.7A
Authority: CN
Inventors: 孙宝茹; 李鹏涛; 李志海
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2023-10-27
Anticipated expiration: 2037-08-28
Also published as: CN107489777A

Abstract

The application provides an air quantity regulating valve, an air quantity changing tail end and an air conditioning system for an air duct. The air quantity regulating valve provided by the application adopts the translation valve, so that the flow in the air duct can be accurately controlled, the noise can be obviously reduced, and the application comfort of a user can be improved.

Description

Air quantity regulating valve for air duct, variable air quantity tail end and air conditioning system

Technical Field

The application relates to the technical field of air conditioning, in particular to an air quantity regulating valve for an air channel, an air quantity changing tail end provided with the air quantity regulating valve and an air conditioning system comprising the air quantity changing tail end.

Background

As shown in fig. 1, a conventional variable air volume end device generally includes a box 1, an acoustic cavity 2, an adjusting air valve 3, an air valve actuator 4, an end controller 5 and a reheater 6, wherein the adjusting air valve 3 is disposed at the front end of the box 1, the adjusting air valve 3 is connected with the end controller 5 through the air valve actuator 4, the air volume is controlled and adjusted by the end controller 5 according to the cabin (indoor) temperature collected by a cabin (indoor) temperature setting device, and the air volume is adjusted by the adjusting air valve. In the whole variable air volume system, 20-30 or more variable air volume terminals are connected with a combined cabinet (equivalent to a blower), and the terminal devices not only need to give consideration to the air volume, but also need to overcome enough inlet static pressure to ensure the balance of a pipe network.

The tail end of the variable air volume can dynamically track the load change of the system, and the temperature of a cabin (indoor) is automatically adjusted by changing the air volume, so that the control target of the differential temperature of each air conditioning area is realized.

As shown in FIG. 1, the air volume of the existing air volume-variable end product is controlled by adopting a butterfly valve, the design process of the butterfly valve is simple, the control is convenient, the valve position opening and the static pressure adjustment are controlled by rotation, but the butterfly valve has two defects: one is in the higher room of throttle requirement (for example near the nearer room of fan), need close the valve and guarantee the amount of wind, the throttle noise that produces this moment is very big, seriously influences user experience. Secondly, the butterfly valve has the characteristic of quick opening, the smaller the valve closing degree is, the faster the air quantity and static pressure change are adjusted, the poor adjusting performance is, and the serious defect is that when the static pressure of a high inlet is overcome and a certain air quantity is ensured, very high throttling noise (howling) is generated due to the closing degree, and the comfort of a user is seriously influenced.

Disclosure of Invention

In view of the above, it is an object of the present application to provide an air volume control valve for an air duct, which is capable of reducing noise and improving a "quick-opening" characteristic, a variable air volume end provided with the air volume control valve, and an air conditioning system including the variable air volume end.

In order to achieve the above purpose, on one hand, the present application adopts the following technical scheme:

the utility model provides an air quantity control valve in wind channel, includes case and disk seat, the disk seat sets up on the wind channel, the case with the disk seat sets up relatively, the adjustment of air quantity control valve's aperture size is through adjusting the distance between case and the disk seat, the distance between adjustment case and the disk seat is through the translation motion of case for the disk seat.

Preferably, the valve element is disposed on a downstream side of the valve seat.

Preferably, the valve core includes a first mating portion, and the valve seat includes a second mating portion mated with the first mating portion.

Preferably, the first mating portion is an annular surface, the annular surface is a part of a spherical surface, or an outer contour of a section of the annular surface passing through an axis thereof is an elliptic arc shape or a parabolic shape; and/or the number of the groups of groups,

the second matching surface is an annular conical surface.

Preferably, a sealing ring is provided on the first mating portion and/or on the second mating portion.

Preferably, an actuator is also included for driving movement of the valve element relative to the valve seat.

Preferably, the valve further comprises a valve core guide for guiding movement of the valve core in a moving direction of the valve core.

On the other hand, the application adopts the following technical scheme:

the tail end of the variable air volume comprises a box body, an air channel is formed in the box body, an air inlet and an air outlet which are communicated with the air channel are formed in the box body, and the air volume adjusting valve is arranged on the air channel.

Preferably, the air inlet is arranged at one side of the box body, an air pipe is connected to the air inlet, and the inner cavity of the air pipe is communicated with the air channel.

Preferably, the air outlet of the air pipe is positioned in the box body, and a balance valve is arranged at a position in the box body opposite to the air outlet of the air pipe.

Preferably, the balance valve comprises a valve core, the end face of one side, facing the air pipe, of the valve core is a spherical surface, and the spherical center of the spherical surface is arranged on an extension line of the central line of the air pipe.

Preferably, a balance valve fixing member is further included for fixing the balance valve.

Preferably, the air conditioner further comprises a valve core guide piece, wherein the valve core guide piece and the balance valve fixing piece are of an integrally formed slender structure, one end of the valve core guide piece and one end of the balance valve fixing piece are fixed on a first support in the air pipe, and the other end of the valve core guide piece and the other end of the balance valve fixing piece are fixed on a second support in the box body.

Preferably, a partition plate is arranged in the box body, the partition plate divides the inner cavity of the box body, and a part of the partitioned space is used for circulation of air flow.

Preferably, the second bracket is disposed on a downstream side of the valve element in a flow direction of the air flow, the second bracket is disposed perpendicular to the partition plate, one side surface thereof is connected to the partition plate, and the other side surface except the side surface connected to the partition plate is connected to the inner wall of the case in a sealing manner.

In yet another aspect, the present application employs the following technical scheme:

an air conditioning system is provided with the variable air volume terminal.

The air quantity regulating valve provided by the application adopts the translation valve, so that the flow in the air duct can be accurately controlled, the noise can be obviously reduced, and the application comfort of a user can be improved.

Drawings

The above and other objects, features and advantages of the present application will become more apparent from the following description of embodiments of the present application with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of a prior art variable air volume tip;

FIG. 2 shows a schematic structural view of a variable air volume tip according to an embodiment of the present application;

fig. 3 is a cross-sectional view of a valve core (a sealing ring is arranged on the valve core) of an air volume adjusting valve according to an embodiment of the present application;

fig. 4 shows a graph of opening versus static pressure for butterfly and translation valves.

Detailed Description

The present application is described below based on embodiments, and it will be understood by those of ordinary skill in the art that the drawings provided herein are for illustrative purposes and that the drawings are not necessarily drawn to scale.

Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to". Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The variable air volume end device is one of key equipment of a variable air volume air conditioning system (Variable Air Volume System), and the air conditioning system adjusts the primary air supply volume through the end device, tracks the load change and maintains the room temperature. As shown in fig. 2, the variable air volume terminal in the present application includes a box 10, an air inlet 101 and an air outlet 102 are provided on the box 10, an air duct 103 communicating the air inlet 101 and the air outlet 102 is formed in the box 10, and an air volume adjusting valve 20 is provided on the air duct 103. The air volume control valve 20 is used for controlling the air volume output from the air outlet 102, and further controlling the air volume input into the room. Preferably, the air inlet 101 is disposed at one side of the box 10, and an air duct 104 is connected to the air inlet 101, and an inner cavity of the air duct 104 is communicated with the air duct 103, so as to introduce air flow into the air duct.

As shown in fig. 2, the air volume control valve 20 includes a valve core 21 and a valve seat 22, the valve seat 22 is disposed on the air duct 103, preferably, the valve seat 22 is fixed on the inner wall of the air duct 103 by a fixing member, for example, a screw, a bolt, a rivet, or the like, or the valve seat 22 may be fixed on the inner wall of the air duct 103 by welding. The air volume flowing through the air duct 103 is regulated by the cooperation of the valve core 21 and the valve seat 22.

In a preferred embodiment, the air volume control valve 20 is a translational valve, that is, the movement of the valve core 21 when adjusting the air volume is translational, rather than rotational, that is, the opening of the air volume control valve 20 is adjusted by adjusting the distance between the valve core 21 and the valve seat 22, and the distance between the valve core 21 and the valve seat 22 is adjusted by translational movement of the valve core 21 relative to the valve seat 22. Preferably, the air flow passing through the valve seat 22 pushes the valve element 21 to move in a direction away from the valve seat 22. In this way, the control of the movement of the valve core 21 can be more accurate, and the air quantity adjustment is more accurate; compared with butterfly valve (rotary operation), the throttle is different, the ventilation area is reduced, the reduction of the ventilation area of the translation valve is linear, the quick opening characteristic of the butterfly valve is avoided, and the accuracy of air quantity regulation can be ensured. In addition, the translation valve can effectively solve the problem of overlarge throttling noise caused by closing the valve under the high static pressure environment, and the change of the air quantity percentage is slow along with the smaller and smaller valve closing, so that the quick closing can be effectively avoided. Further preferably, in the airflow flowing direction, the valve core 21 is disposed on the downstream side of the valve seat 22, so that the mating surface of the valve core 21 is a windward surface, and the position of the valve core 21 relative to the valve seat 22 can be controlled more accurately, especially when the valve opening is smaller, the accurate control of the valve core 21 can be realized, the throttling noise can be effectively reduced, and the quick-opening characteristic can be relieved.

As shown in fig. 2-3, in a preferred embodiment, the valve core 21 includes a first mating portion 211, the valve seat 22 includes a second mating portion 221, and the air volume flowing through the air duct 103 is adjusted by adjusting the distance between the first mating portion 211 and the second mating portion 221. For example, when the air volume adjusting valve 20 is in the closed state, the first matching portion 211 and the second matching portion 221 are tightly matched, for example, by pressing the first matching portion 211 on the second matching portion 221, the air duct 103 is closed, so that the tail end of the variable air volume is closed, and the air volume is zero; when the air volume in the air duct 103 needs to be adjusted, the second fitting part 221 is separated from the first fitting part 211, so that an air supply gap is formed between the first fitting part 211 and the second fitting part 221, and the effective area of the air supply gap determines the magnitude of the air supply volume flowing through the air duct 103. Preferably, the first mating portion 211 is an annular surface, which may be a part of a spherical surface, or an outer contour of a cross section of the annular surface passing through an axis thereof is an elliptical arc shape or a parabolic shape, and the second mating surface 221 is also an annular surface, which may be a conical surface or any other annular surface. Preferably, a sealing ring 212 is disposed on the first matching portion 211, and the sealing ring 212 can increase the sealing performance when the valve is closed; alternatively, a seal ring may be provided on the second fitting portion 221, so that the sealing effect can be achieved. By setting the first matching part 211 at the windward position to be an annular surface with an elliptical arc or a parabolic profile, the opening degree of the valve can be precisely controlled, and as known from fluid mechanics, the three-dimensional surface such as a spherical surface can well buffer and transition high-speed gas, so that throttling noise brought when the opening degree of the valve is reduced from large to small can be effectively reduced, and the use experience effect of a user is improved.

In order to drive the movement of the valve body 21 relative to the valve seat 22, as shown in fig. 2, an actuator 30 is provided in the housing 10. In order to avoid that the actuator 30 affects the flow of the air flow, the actuator 30 is not arranged on the flow path of the air flow. Specifically, a partition plate 40 is disposed in the box 10, the partition plate 40 separates the inner cavity of the box 10, a part of the space 41 separated by the partition plate is used as a part of the airflow channel for airflow circulation, and the other part of the space is used for placing the actuator 30 or the control component, so that the influence of the airflow at low temperature or high temperature on the normal operation of the actuator, the control component and the like can be avoided. Preferably, the space 41 is located at an upper side of the partition 40, and the air flow flows between an upper surface of the partition 40 and an inner wall of the case 10.

In order to guide the movement of the valve body 21, a valve body guide 213 is provided in the case 10, and the valve body guide 213 can guide the movement of the valve body 21 in the movement direction of the valve body 21.

As shown in fig. 2, in a preferred embodiment, a heating device 50 is provided inside the air outlet 102 for temperature regulation of the air flow passing therethrough. The control device controls the operating state of the heating device 50 according to the measured air flow temperature and the set target temperature, and is used for adjusting the temperature of the air flow, such as heating. Preferably, the heating device 50 is an electric heating device, which is convenient to install and control.

In a preferred embodiment, the air outlet of the air duct 104 is located in the box 10, and a balance valve 60 is disposed in the box 10 opposite to the air outlet of the air duct 104, where the balance valve 60 includes a valve core 61, and an end surface of the valve core opposite to the air duct 104 is preferably a spherical surface, and a center of the spherical surface is on an extension line of a center line of the air duct 104, and the spherical surface is a certain distance from the air outlet of the air duct 104, for example, greater than 0 mm and less than or equal to 60 mm. The airflow blown out from the air outlet of the air pipe 104 is firstly blown onto the spherical surface after entering the box body 10, and after collision with the spherical surface, the flow speed of the airflow can be delayed, the noise can be reduced, and the flow speed of the airflow can be balanced, for example, under the condition that local turbulence or unbalanced flow speed exists in the airflow in the air pipe 104, the airflow can be more balanced after passing through the spherical surface, and the noise can be further reduced.

Preferably, in order to fix the balance valve 60 in the axial direction of the air duct 104, the variable air volume end of the present application further includes a balance valve fixing member 70, and the fixing member 70 may be integrally formed with the valve core guiding member 213, or may be a separate structure. In a preferred embodiment, the balance valve fixture 70 and the spool guide 213 are integrally formed, preferably of an elongated configuration, with one end secured to the first bracket 71 in the air duct 104 and the other end secured to the second bracket 72 in the housing 10. Preferably, the balance valve 60 and the spool 21 are respectively sleeved on the fixing member 70 and the spool guide 213 through holes provided thereon. The position of the balancing valve 60 in the axial direction of the air duct 104 relative to the fixing member 70 is adjustable, and the balancing valve 60 is fixed after being adjusted, so that the distance between the balancing valve 60 and the air outlet of the air duct 104 can be adjusted according to different air volume requirements of the air duct 104, and the best balancing and speed reducing effects can be achieved; the valve core 21 of the air volume adjusting valve 20 is slidable on the valve core guide 213 in the axial direction of the air duct 104, so that the valve core 21 can adjust the distance between the valve core 21 and the valve seat 22 of the air volume adjusting valve 20 along the valve core guide 213 under the driving of the actuator 30, further adjust the opening degree of the air volume adjusting valve 20, and control the air volume in the air duct, wherein the valve core guide 213 is used for positioning the valve core 21 in a plane perpendicular to the moving direction of the valve core 21, and in the moving process of the valve core 21, the valve core guide 213 can guide the movement of the valve core 21, thereby improving the moving stability of the valve core 21.

Preferably, the second bracket 72 is provided on the downstream side of the spool 21 in the flow direction of the air flow. In a preferred embodiment, the second bracket 72 is disposed perpendicular to the partition 40, and has one side connected to the partition 40, and the other side except the side connected to the partition 40 is hermetically connected to the inner wall of the cabinet 10, as shown in fig. 2, so that the air flow from the air volume adjusting valve 20 is guided into the space 41, and then flows out of the variable air volume end through the air outlet 102 around the partition 40.

The air quantity regulating valve in the application and the butterfly valve in the prior art are subjected to noise test (semi-silencing chamber), and the test result is shown in fig. 4, and under the condition of overcoming the same inlet static pressure and the same air quantity, the noise of the butterfly valve (left) in the prior art and the noise of the translation valve (right) in the application are compared. As can be seen from fig. 4, as the valve throttle is higher (the smaller the valve is, 100% in the figure indicates that the valve is fully opened, 90% in the figure indicates that the valve opening is 90%), the magnitude of the static pressure to be overcome increases exponentially, and the noise generated by the two valves is not obviously different when the valve opening is larger under the low static pressure. However, under high static pressure, the throttle noise generated by the translation valve is obviously lower than that of a butterfly valve, under 500Pa static pressure, the unit noise generated by the throttle of the butterfly valve is 54dB (A), and the unit noise generated by the translation valve is lower than 43.8dB (A). Therefore, the performance of the translation valve for pressure maintaining and noise reduction is obviously superior to that of a butterfly valve.

The air quantity regulating valve adopts the translation valve, so that the flow in the air duct can be accurately controlled, the noise can be obviously reduced, and the user requirement can be improved.

Furthermore, the application also provides an air conditioning system which comprises the variable air volume tail end, and can effectively reduce noise of the air conditioning system.

It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. The tail end of the variable air quantity comprises a box body, wherein an air channel is formed in the box body, and an air inlet and an air outlet which are communicated with the air channel are formed in the box body;

the air quantity regulating valve comprises a valve core and a valve seat, the valve seat is arranged on the air duct, the valve core and the valve seat are arranged opposite to each other, the opening degree of the air quantity regulating valve is adjusted by adjusting the distance between the valve core and the valve seat, and the distance between the valve core and the valve seat is adjusted by translational movement of the valve core relative to the valve seat; the air quantity regulating valve further comprises a valve core guide piece, wherein the valve core guide piece is used for guiding the movement of the valve core in the movement direction of the valve core, and the valve core is sleeved on the valve core guide piece through a hole arranged on the valve core;

the air inlet is arranged at one side of the box body, an air pipe is connected to the air inlet, and the inner cavity of the air pipe is communicated with the air channel;

the air outlet of the air pipe is positioned in the box body, and a balance valve is arranged at the position in the box body opposite to the air outlet of the air pipe;

the balance valve is characterized by further comprising a balance valve fixing piece used for fixing the balance valve, wherein the valve core guide piece and the balance valve fixing piece are of an integrally formed slender structure, and the position of the balance valve relative to the balance valve fixing piece is adjustable.

2. The variable air volume tip of claim 1, wherein the spool is disposed on a downstream side of the valve seat.

3. The variable air volume tip according to claim 1 or 2, wherein the valve spool includes a first mating portion, and the valve seat includes a second mating portion that mates with the first mating portion.

4. A variable air volume tip according to claim 3,

the first matching part is an annular surface, the annular surface is a part of a spherical surface, or the outer contour of the cross section of the annular surface passing through the axis of the annular surface is elliptic arc or parabolic; and/or the number of the groups of groups,

the second matching part is an annular conical surface.

5. A variable air volume tip according to claim 3, characterized in that a sealing ring is provided on the first mating part and/or on the second mating part.

6. The variable air volume tip according to claim 1 or 2, further comprising an actuator for driving movement of the spool relative to a valve seat.

7. The variable air volume tip of claim 1, wherein the balance valve comprises a spool, an end surface of the spool facing the air duct is a sphere, and a center of the sphere is on an extension line of a center line of the air duct.

8. The variable air volume tip of claim 1, wherein the balance valve fixing member is fixed at one end to a first bracket in the duct and at the other end to a second bracket in the cabinet.

9. The variable air volume tip of claim 8, wherein a partition is disposed within the housing, the partition dividing the interior cavity of the housing, a portion of the space being partitioned for airflow.

10. The variable air volume tip according to claim 9, wherein the second bracket is provided on a downstream side of the spool in a flow direction of the air flow, the second bracket is provided perpendicularly to the partition plate, one side surface thereof is connected to the partition plate, and the other side surface other than the side surface connected to the partition plate is hermetically connected to the inner wall of the case.

11. An air conditioning system, characterized in that the variable air volume tip of one of claims 1 to 10 is provided.